Table 1. Percentage and characteristics of segmentation errors identified using the ganglion cell algorithm analysisa.
| Type | Percentage |
|---|---|
| Retinal layer misidentification | |
| Inner | 62% |
| Outer | 17.2% |
| Both | 20.79% |
| Missing Inner segmentation line | 100% |
| Missing Outer segmentation line | 0% |
| Deviation | |
| Upward | 47.91% |
| Downward | 33.43% |
| Both | 18.65% |
| Degree of deviation | |
| Mild (less than 10 microns) | 38.6% |
| Moderate (10–50 microns) | 20.9% |
| Severe (more than 50 microns) | 40.3% |
| Affected Scan area | |
| Nasal 2500 microns | 11.2% |
| Central | 16.8% |
| Temporal 2500 microns | 11.4% |
| Affected zones | |
| Upper Zone (1st - 41st scan) | 20% |
| Central Zone (42nd - 84th scan) | 30% |
| Lower Zone (85th -128th scan) | 47% |
a = Percentages are calculated out of total scans with errors (1029 scans), except for motion artifacts which is calculated from total number of eyes (30)